Support interpolation of animatable shorthand properties containing var()

Support interpolation of animatable shorthand properties containing var()

This change adds support for handling pending substitution values to CSS
animations to allow for smooth interpolation between shorthand values
with var() references in them.

BUG=647123
Committed: https://crrev.com/ee86696437fd6bc8f16d8ab872263cef2c02131b
Cr-Commit-Position: refs/heads/master@{#419096}

[alancutter (OOO until 2018), 2016-09-15 04:35:11]

alancutter@chromium.org changed reviewers:
+ timloh@chromium.org

[alancutter (OOO until 2018), 2016-09-15 05:33:47]

The CQ bit was checked by alancutter@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-09-15 05:33:51]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-15 08:11:28]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-09-15 08:11:28]

Dry run: This issue passed the CQ dry run.

[Timothy Loh, 2016-09-16 03:57:42]

On 2016/09/15 04:35:12, alancutter wrote:

lgtm

[alancutter (OOO until 2018), 2016-09-16 04:01:51]

The CQ bit was checked by alancutter@chromium.org

[commit-bot: I haz the power, 2016-09-16 04:02:07]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-16 04:07:29]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-09-16 04:10:22]

Description was changed from

==========
Support interpolation of animatable shorthand properties containing var()

This change adds support for handling pending substitution values to CSS
animations to allow for smooth interpolation between shorthand values
with var() references in them.

BUG=647123
==========

to

==========
Support interpolation of animatable shorthand properties containing var()

This change adds support for handling pending substitution values to CSS
animations to allow for smooth interpolation between shorthand values
with var() references in them.

BUG=647123

Committed: https://crrev.com/ee86696437fd6bc8f16d8ab872263cef2c02131b
Cr-Commit-Position: refs/heads/master@{#419096}
==========

[commit-bot: I haz the power, 2016-09-16 04:10:24]

Patchset 2 (id:??) landed as
https://crrev.com/ee86696437fd6bc8f16d8ab872263cef2c02131b
Cr-Commit-Position: refs/heads/master@{#419096}